"We appreciate the personal involvement of President Obama and Vice President Biden in the support for the Ukrainian people," Yatsenyuk said after the first U.S.-Ukraine Business Forum, according to the Ukrainian government's portal.
The Ukrainian premier also said his government was grateful for the support of both parties in U.S. Congress.
"The whole American nation is united in maintaining the Ukrainian people, and we thank you," Yatsenyuk said.
According to him, the first U.S.-Ukraine Business Forum is "just the first step" and "we will get more if we do more."
"We have chosen the difficult but right path – to carry out sometimes painful, but necessary reforms and build up a base for the prosperous future of Ukraine," Yatsenyuk said.